ltbong Posted July 15, 2007 Share Posted July 15, 2007 Hey guys I need some help troubleshooting my 92 SC300 (237K). This past week I've had problems with acceleration where I would lose power and regain immediately...I would describe them as "hiccups" whether I was accelerating or cruising on the freeway. I also had one occaision where the it had a hard time cold starting. I did some tests per the manual and thought that the fuel pump was at fault. I changed that out yesterday and thought it was running fine. But I find that I'm still having a problem with starting and the "hiccups" are now less severe. Reading through the manual I jumpered the FP and +B connectors and the engine fires up immediately every time. Does this mean my fuel pump ecu is shot? I did replace my fuel pump ecu at about 200k but I did replace it with one from a junk yard. But my symptoms at that time where that when I started the car it would start fine but die immediately. This time it won't start at all. Any help is appreciated! UPDATE: I did the fuel pump ECU bypass trick and everything is running perfect! Quote Link to comment Share on other sites More sharing options...
Only1GQman Posted September 21, 2007 Share Posted September 21, 2007 Hey guys I need some help troubleshooting my 92 SC300 (237K). This past week I've had problems with acceleration where I would lose power and regain immediately...I would describe them as "hiccups" whether I was accelerating or cruising on the freeway. I also had one occaision where the it had a hard time cold starting. I did some tests per the manual and thought that the fuel pump was at fault. I changed that out yesterday and thought it was running fine. But I find that I'm still having a problem with starting and the "hiccups" are now less severe. Reading through the manual I jumpered the FP and +B connectors and the engine fires up immediately every time. Does this mean my fuel pump ecu is shot? I did replace my fuel pump ecu at about 200k but I did replace it with one from a junk yard. But my symptoms at that time where that when I started the car it would start fine but die immediately. This time it won't start at all. Any help is appreciated! UPDATE: I did the fuel pump ECU bypass trick and everything is running perfect! Hey I was wondering if you are running the car by bypassing the fuel pump control? If so- is the car running with any problems? I have the same issue now, I got no power to the fuel pump. I wanted to try to bypass the FPC. Any info would be appriciated. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.